name = 'juan'
puts name.capitalize

name = 'JUAN'

puts name
puts name.downcase

cat = ''

if cat.empty?
  puts 'Cat is empty'
else
  puts 'Cat is not empty'
end

if name.include?('J')
  puts "#{name} includes 'J'"
end

str = 'Hello, my, name, is, comma, separated, sentence'

puts str

puts str.split(',')

puts str.length